JP4800283B2 - Wiring block storage structure - Google Patents

Description

  The present invention relates to a wiring block housing structure in which a wiring block formed by wiring various electronic components to a substrate is housed and held in a case in an electric device such as a discharge lamp lighting device.

For example, in a discharge lamp lighting device that is an electric device, there are some in which various electronic components are wired on a printed circuit board to form a wiring block, and the wiring block is housed and held in a case.
In the conventional wiring block storage structure in this type of electrical equipment, an inwardly projecting pedestal is provided on a pair of side walls of the case body by cutting and forming, and the outer peripheral portion of the printed circuit board of the wiring block is provided on this pedestal. Thus, the wiring block was housed in the case so that the wiring block floated from the case bottom wall and the printed circuit board was parallel to the case bottom wall.
JP 2001-326306 A

However, in the conventional case, in order to insulate the case from the printed circuit board, it is necessary to provide a sufficient insulation distance by separating the printed circuit board from the case bottom wall. As a result, the case becomes larger and the discharge lamp lighting device There has been a problem that the entire electrical equipment such as the above becomes larger.
In view of the above problems, the present invention can reliably insulate a case from a printed circuit board, and at the same time, can reduce the size of the case, thereby reducing the size of the entire electrical apparatus.

The technical means of the present invention that solves this technical problem is a wiring block storage structure in which various electronic components are wired to a substrate to form a wiring block, and the wiring block is stored and held in a case.
An insulating sheet that covers the wiring block is provided, and the substrate and the case are insulated by the insulating sheet ,
The case includes a case body and a case lid that closes the opening of the case body, and the insulating sheet includes a sheet body and a sheet lid that closes the opening of the sheet body, and the sheet lid is between the case lid and the wiring block. Placed in
A lead terminal projecting from the electronic component of the wiring block is inserted into an attachment hole penetrating the substrate and attached to the substrate, and the lead terminal is bent to be placed sideways so that the electronic component lies down.
The sheet cover is provided with a first protrusion protruding toward the case cover and a second protrusion protruding toward the wiring block,
A plurality of first projections of the seat lid are provided in the longitudinal direction of the seat lid, spaced apart from the second projection in the longitudinal direction of the seat lid and disposed on both sides thereof, and contacted with the inner surface of the case lid, The second protrusion of the sheet lid is pressed against the substrate side so as to hold the electronic components of the wiring block sideways, and the portion corresponding to the second protrusion of the sheet cover is an intermediate position of the plurality of first protrusions. It is in the point separated from.

Also, other technical means of the present invention, the case body, and a pair of case sidewalls upstanding from both ends in the width direction of the case bottom wall and the case bottom wall, the seat body, the seat bottom wall and The seat body has a pair of seat side walls erected from both ends in the width direction of the seat bottom wall, and the seat body has the seat bottom wall along the inner surface of the case bottom wall and the pair of seat side walls along the inner surface of the case side wall. The wiring block is housed in the seat body, the wiring block substrate is arranged to face the case bottom wall, and the sheet bottom wall is interposed between the substrate and the case bottom wall. .

In addition, locking pieces formed by cutting and raising are provided on both ends of the case bottom wall in the longitudinal direction, and the movement of the substrate in the longitudinal direction is restricted by the pair of locking pieces in the longitudinal direction, and the pair of case side walls of the case body Therefore, another technical means of the present invention in which the movement in the width direction of the substrate is regulated is in the point.
Another technical means of the present invention is that the support convex portions are provided on both sides in the longitudinal direction of the sheet bottom wall, and the substrate is supported by the support convex portions so that the wiring surface side of the substrate floats from the sheet bottom wall. There is in point.

  Further, according to another technical means of the present invention, an electronic component that requires heat dissipation is attached to the wiring surface side of the substrate, and a heat dissipation rubber is provided between the electronic component and the seat bottom wall. It is in contact with the case bottom wall through the seat bottom wall.

  According to the present invention, the case and the printed board can be reliably insulated by the insulating sheet, and it is not necessary to provide a sufficient insulation distance by separating the printed board from the case bottom wall as in the prior art. The case can be made small, and the entire electrical equipment such as the discharge lamp lighting device can be miniaturized.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 5, 18, and 19, reference numeral 1 denotes a wiring block (lighting device main body) of a discharge lamp lighting device, which is configured by wiring various electronic components A and B to a printed circuit board 3. On the front surface (upper surface) and back surface (lower surface) of the printed circuit board 3, a rectifier 42, an inductor 46, switching elements 45, 52, 53, a smoothing capacitor 48, a diode 47, an inductor 55, a capacitor 54, a capacitor 58, a resistor, Various electronic components A and B of a discharge lamp lighting device such as a transformer are arranged. Of the electronic components A and B, the electronic components A (46, 47, 48, 54, 55, 58, etc.) that do not need to radiate heat (small heat generation) are arranged on the surface side of the printed circuit board 3. Of the electronic components A and B, electronic components (power semiconductor surface mount components with large heat generation) B (42, 45, 52, 53) that need to radiate heat are disposed on the back side (wiring surface side).

A large number of copper foils for printed wiring of the electronic components A and B are arranged on the back surface (lower surface) of the printed circuit board 3, and the lead wires of the various electronic components A and B are soldered on the back surface side of the printed circuit board 3 by solder. Connected to the foil.
4 is a metal case for storing and holding the wiring block 1, and includes a case main body 5 and a case lid 7 for closing the upper end opening 6 of the case main body 5. As shown in FIGS. 6 to 8, the case body 5 is formed in a U-shape with an upper end opened by a metal plate, and a pair of cases standing from the width direction both ends of the case bottom wall 8 and the case bottom wall 8. And a side wall 9.

As shown in FIGS. 9 to 11, the case lid 7 is formed in a U shape with a lower end opened by a metal plate, and a pair of side walls 11 projecting downward from both ends of the top wall 10 in the width direction. The case lid 7 is externally fitted to the upper end of the case body 5 so that the pair of side walls 11 are attached to the pair of case side walls 9 from the outside.
A pair of first engagement pieces 13 are formed by cutting and raising at both longitudinal ends of the pair of side walls 11, and the pair of first engagement pieces 13 are gradually inclined inward in the width direction as going downward. ing. In addition, the second engagement pieces 14 are formed by cutting and raising at the center side in the longitudinal direction of the pair of side walls 11, and each second engagement piece 14 goes toward the center side in the longitudinal direction and gradually goes inward in the width direction. Is so inclined.

  A pair of first locking holes 15 are provided at the upper ends of the pair of case side walls 9 corresponding to the pair of first engaging pieces 13 of the case lid 7, respectively, and the second engaging pieces 14 of the case lid 7 are provided. The second locking holes 16 are provided corresponding to the case, and when the case lid 7 is externally fitted so as to close the upper end opening 6 of the case body 5, the pair of first engagement pieces 13 are paired with the first pair of first engagement pieces 13. The case lid 7 is engaged with the locking hole 15 so as to prevent the case lid 7 from rattling in the vertical direction with respect to the case main body 5. The case lid 7 is engaged with the locking holes 16 so that the case lid 7 does not rattle with respect to the case body 5 in the longitudinal direction.

  As shown in FIGS. 3, 5, 18, and 19, an insulating sheet 18 that covers the wiring block 11 is provided in the case 4. As shown in FIGS. 12 to 14, the insulating sheet 18 includes a sheet body 19 and a sheet lid 21 that closes the upper end opening 20 of the sheet body 19. The sheet body 19 is formed in a U-shape with an upper end opened by an insulating synthetic resin such as a polyester film, and a pair of sheet side walls 23 erected from both ends of the sheet bottom wall 22 and the width direction of the sheet bottom wall 22. have. At both ends of the seat bottom wall 22 in the longitudinal direction, a standing piece 24 rising from the outer end of the seat bottom wall 22 and a regulating piece 25 projecting outward in the longitudinal direction from the upper end of the standing piece 24 are provided.

As shown in FIGS. 15 to 17, the sheet lid 21 is formed in a rectangular shape by an insulating synthetic resin such as a polyester film, and is disposed so as to close the upper end opening 20 of the sheet main body 19. At both ends in the longitudinal direction of the seat lid 21, closing pieces 26 that protrude downward from the outer end of the seat lid 21 are provided.
The sheet main body 19 is disposed in the case main body 19 such that the sheet bottom wall 22 follows the inner surface of the case bottom wall 8 and the pair of sheet side walls 23 respectively follow the inner surface of the case side wall 9. The wiring block 1 is accommodated in the sheet main body 19, and the printed circuit board 3 of the wiring block 1 is disposed so as to face the case bottom wall 8. A sheet bottom wall 22 is interposed between the printed circuit board 3 and the case bottom wall 8, and the printed circuit board 3 and the case 4 are insulated by an insulating sheet 18.

  As shown in FIGS. 3 to 8, 18, and 19, a pair of locking pieces 27 in the width direction formed by cutting and raising are provided in the longitudinal direction on both ends in the longitudinal direction of the case bottom wall 8. . When the outer end in the longitudinal direction of the printed circuit board 3 is brought into contact with the locking piece 27 via the standing piece 24 and the regulating piece 25 of the sheet body 19, the pair of locking pieces 27 in the longitudinal direction are used for printing. The movement of the substrate 3 in the longitudinal direction is restricted, and the printed circuit board 3 is insulated from the standing piece 24 and the restriction piece 25 of the sheet main body 19 with respect to the locking piece 27.

The outer ends of the printed circuit board 3 in the width direction come into contact with the pair of case side walls 9 via the pair of sheet side walls 23, thereby restricting movement of the printed circuit board 3 in the width direction by the pair of case side walls 9. In addition, the printed circuit board 3 is insulated from the pair of case side walls 9 by the pair of sheet side walls 23.
A sheet lid 21 is disposed between the case lid 7 and the wiring block 1, and the sheet lid 21 has a first protrusion 28 projecting toward the case lid 7 and a wiring block 1 side as shown in FIGS. 15 to 17. And a second protrusion 29 protruding from the center. In the present embodiment, one second protrusion 29 is arranged at the central portion in the longitudinal direction of the case lid 7, and the first protrusion 28 is provided at two intervals on the both sides in the longitudinal direction of the second protrusion 29. A total of four are arranged.

  As shown in FIGS. 4, 18, and 19, the plurality of first protrusions 28 are in contact with the inner surface of the case lid 7, and the second protrusions 29 hold the electronic component A of the wiring block 1 toward the printed circuit board 3. ing. This electronic component A is a smoothing capacitor 48 which will be described later and is a long-shaped electronic component A. An attachment in which a pair of lead terminals 32 projecting from the electronic component A (48) are formed through the printed circuit board 3. It is inserted into the hole and attached to the printed circuit board 3 with solder 33. In the case of the electronic component A (48), the pair of lead terminals 32 are bent and arranged sideways so that the electronic component A is laid down, and the electronic component A is held sideways by the second protrusion 29 of the seat lid 21. The printed circuit board 3 is pressed down.

  As shown in FIGS. 12 to 14, 18, and 19, support convex portions 30 are provided by embossing on both sides in the longitudinal direction of the sheet bottom wall 22, and the wiring surface side of the printed circuit board 3 is connected to the sheet bottom wall 22 and The printed circuit board 3 is supported by the support convex portion 30 so as to float from the case bottom wall 8. As shown in FIGS. 4, 18, and 19, a heat dissipation rubber 31 is provided between the electronic component B (42, 45, 52, 53) that requires heat dissipation of the wiring block 1 and the seat bottom wall 22, The heat radiation rubber 31 is in contact with the case bottom wall 8 through the seat bottom wall 22. The electronic component B of the wiring block 1 is pressed from the upper side against the heat radiating rubber 31, and the heat radiating rubber 31 is in a state where the upper surface side is recessed due to elasticity and the lower end portion of the electronic component B is embedded therein.

  FIG. 20 shows an example of a circuit diagram of a discharge lamp lighting device provided with the wiring block 1. In FIG. 20, 41 is a commercial AC power source, 42 is a rectifier (electronic component B), and is constituted by a diode bridge or the like. 43 is a chopper circuit. The AC power source 41 and the rectifier 42 constitute a DC power source, and the AC power source 41, the rectifier 42 and the chopper circuit 43 constitute an active filter.

  The chopper circuit 43 boosts the rectified output of the rectifier 42 to obtain a predetermined DC voltage. The chopper circuit 43 has a switching element 45 (electronic component B) composed of an insulated gate field effect transistor (MOSFET) and an inductor for an active filter. 46 (electronic component A), a diode 47, and a smoothing capacitor 48, the switching element 45 is turned on and off at a high frequency to chop the rectified output of the rectifier 42, and energy is stored in the inductor 46 when the switching element 45 is on. When the switching element 45 is off, the energy stored in the inductor 46 is discharged through the diode 47 and the chopping voltage output through the diode 47 is smoothed by the smoothing capacitor 48.

  Reference numeral 51 denotes an automatic other-excitation inverter circuit, which includes a pair of switching elements 52 and 53 constituted by an insulated gate field effect transistor (MOSFET), a DC cut capacitor 54, and an inductance 55, and a pair of switch elements 52. , 53 are connected in series with each other and connected between the output terminals of the chopper circuit 43, and are connected to the inductance 55 via the DC cut capacitor 54 from the midpoint of the switch elements 52, 53 so as to form a half bridge circuit. An electric lamp 57 is connected, and this inductance 55 and a capacitor 58 connected in parallel to the discharge lamp 57 constitute a series resonance circuit.

  The operation of the discharge lamp lighting device will be described. The AC power supply 41 is rectified and smoothed by the rectifier 42, and the switching element 45 is turned on and off to boost the DC output of the rectifier 42 by the chopper circuit 43 to obtain a predetermined DC voltage. Then, by alternately turning on and off the pair of switch elements 52 and 53 connected in series to the output of the chopper circuit 43, the inverter circuit 51 converts the output of the chopper circuit 43 into a high frequency, and the inductance 55, the capacitor 54, and the release circuit. The LC resonance circuit composed of the electric lamp 57 is excited by the inverter circuit 51 to light the discharge lamp 57 at high frequency.

  According to the embodiment, the insulating sheet 18 that covers the wiring block 1 is provided, and the printed circuit board 3 and the case 4 are insulated by the insulating sheet 18. As a result, it is not necessary to provide a sufficient insulation distance by separating the printed circuit board 3 from the case bottom wall 8 as in the prior art. As a result, the case 4 can be made smaller, and the discharge lamp The entire electrical equipment such as a lighting device can be reduced in size.

The case 4 includes a case body 5 and a case lid 7 that closes the opening of the case body 5, and the insulating sheet 18 includes a sheet body 19 and a sheet lid 21 that closes the opening of the sheet body 19.
A sheet lid 21 is disposed between the case lid 7 and the wiring block 1, and the sheet lid 21 is provided with a first projection 28 projecting toward the case lid 7 and a second projection 29 projecting toward the wiring block 1. The first protrusion 28 is brought into contact with the inner surface of the case lid 7 and the second protrusion 29 presses the electronic component A of the wiring block 1 toward the substrate 3, so that the wiring block 1 is utilized using the sheet lid 21. The electronic component A attached to the wiring block 1 can be elastically pressed so as not to rattle, and the sheet lid 21 has the first projection 28 projecting toward the case lid 7, so that the electronic component A is attached to the printed circuit board 3. When the electrical distance between the electronic component A and the case lid 7 is reduced, and the electrical equipment such as the discharge lamp lighting device is transported, the lead wires of the electronic components A and B are cut by the stress of vibration. Can prevent Further, it is possible to prevent the stress on the solder surface of the printed circuit board 3 from being excessively caused by vibration during transportation and causing a solder crack in the long term. In addition, since the first protrusion 28 and the second protrusion 29 have cushioning properties, stress on the solder parts of the electronic components A and B attached to the printed circuit board 3 can be more effectively reduced.

  In addition, the lead terminal 32 protruding from the electronic component A is bent so as to be laid sideways so that the electronic component A is laid down, and the second protrusion 29 of the sheet lid 21 holds the electronic component A sideways. Since the electronic component A has a long shape, the length of the electronic component A protruding from the printed circuit board 3 can be kept small, and the entire wiring block 1 is made as thin as possible. As a result, the case 4 can be formed in a low shape, and an electric device such as a discharge lamp lighting device can be formed at a low height.

  The case body 5 includes a case bottom wall 8 and a pair of case side walls 9 rising from both ends in the width direction of the case bottom wall 8. The seat body 19 includes a seat bottom wall 22 and a width direction of the seat bottom wall 22. The seat body 19 has a pair of seat side walls 23 standing from both ends, and the seat bottom wall 22 is attached to the inner surface of the case bottom wall 8 and the pair of seat side walls 23 is attached to the inner surface of the case side wall 9. The wiring block 1 is accommodated in the sheet body 19, the printed circuit board 3 of the wiring block 1 is disposed so as to face the case bottom wall 8, and the sheet bottom is interposed between the printed circuit board 3 and the case bottom wall 8. Since the wall 22 is interposed, the printed circuit board 3 to the wiring block 1 are separated from each other by surrounding the wiring block 1 in the case body 5 with the sheet bottom wall 22 and the pair of sheet side walls 23 of the sheet body 19. It can be surely insulated without the need for distance.

  In addition, locking pieces 27 cut and raised are provided at both longitudinal ends of the case bottom wall 8, and the longitudinal movement of the printed circuit board 3 is restricted by the pair of locking pieces 27 in the longitudinal direction. 5, the movement of the printed circuit board 3 in the width direction is restricted by the pair of case side walls 9, so that the movement of the printed circuit board 3 can be restricted in the longitudinal direction and the width direction. In combination with the movement restriction of the wiring block 1 in the vertical direction by the 28 and the second protrusion 29, the play of the wiring block 1 to the printed circuit board 3 during transportation can be reliably regulated. In addition, since it is not necessary to screw the printed circuit board 3 to the case 4, tools such as a screwdriver are not required for assembling electric devices such as a discharge lamp lighting device, and the workability of assembling the electric devices is improved. Can be made.

  In addition, the support convex portions 30 are provided on both sides of the sheet bottom wall 22 in the longitudinal direction, and the printed circuit board 3 is supported by the support convex portions 30 so that the wiring surface side of the printed circuit board 3 is floated from the sheet bottom wall 22. A slight gap can be formed between the printed circuit board 3 and the sheet side wall 22 with a simple configuration, and the fact that the sheet bottom wall 22 is interposed between the printed circuit board 3 and the case bottom wall 8. As a result, the printed circuit board 3 can be more reliably insulated from the case body wall 22.

  In addition, an electronic component B (power semiconductor surface mounting component) that requires heat dissipation is attached to the wiring surface side of the printed circuit board 3, and a heat radiation rubber 31 is provided between the electronic component B and the sheet bottom wall 22 to dissipate heat. Since the rubber 31 is in contact with the case bottom wall 8 via the seat bottom wall 22, the temperature rise due to heat generation of the electronic component B can be smoothly radiated to the case 4 side through the heat radiation rubber 31, and the electronic component B The temperature rise due to heat generation can be suppressed. Moreover, the elastic force of the heat radiating rubber 31 can be used to elastically sandwich the case main body 5 and the case cover 7 via the sheet main body 19 and the sheet cover 21, and also from this point. In the transportation, it is possible to prevent the printed circuit board 3 or the wiring block 1 from rattling, and when the electrical equipment such as the discharge lamp lighting device is transported, the lead wires of the electronic components A and B are cut by the stress of vibration. Can be prevented, and stress on the solder parts of the electronic components A and B can be reduced.

In the above embodiment, the present invention is applied to a discharge lamp lighting device as an electric device, and the lighting device body is configured by the wiring block 1. However, the electric device to which the present invention is applied is a discharge lamp. The device is not limited to the lighting device, and may be a tape recorder, a radio, or other electrical equipment.
Moreover, in the said embodiment, although the printed circuit board 3 is used as a board | substrate for wiring various electronic components A and B and comprising the wiring block 1, it is for wiring various electronic components A and B. The board is not limited to the printed board 3, and other wiring boards may be used as long as various electronic components A and B can be wired.

It is a top view of the lighting device main body which shows one embodiment of this invention. It is a front view of the lighting device body. It is a side view of the lighting device main body. It is a top view of the state which removed the case cover of the lighting device main body. It is a side view of the state which removed the case cover of the lighting device main body. It is a top view of the case main body. It is a front view of the case body. It is a side view of the case main body. It is a top view of the case lid. It is a front view of the case lid. It is a side view of the case lid. It is a top view of the sheet body. It is a front view of the sheet body. It is a side view of the sheet body. It is a top view of the sheet lid. It is a front view of the sheet lid. It is a side view of the sheet lid. It is the sectional view on the AA line of the same FIG. It is the BB sectional view taken on the line of FIG. It is a circuit diagram of a discharge lamp lighting device.

DESCRIPTION OF SYMBOLS 1 Wiring block 3 Printed circuit board 4 Case 6 Upper end opening 5 Case main body 7 Case lid 8 Case bottom wall 9 Case side wall 18 Insulating sheet 19 Sheet main body 20 Upper end opening 21 Sheet lid 22 Sheet bottom wall 23 Sheet side wall 27 Locking piece 28 1st Protrusion 29 Second protrusion 30 Supporting convex portion 31 Heat radiation rubber 32 Lead terminal A Electronic component B Electronic component

Claims (5)

In a wiring block storage structure in which various electronic components (A, B) are wired to a substrate (3) to form a wiring block (1), and the wiring block (1) is stored and held in a case (4). ,
An insulating sheet (18) covering the wiring block (1) is provided, and the substrate (3) and the case (4) are insulated by the insulating sheet (18) ,
The case (4) includes a case body (5) and a case lid (7) that closes an opening of the case body (5), and the insulating sheet (18) includes a sheet body (19) and a sheet body (19). A sheet lid (21) for closing the opening of the sheet, the sheet lid (21) is disposed between the case lid (7) and the wiring block (1),
A lead terminal (32) protruding from the electronic component (A) of the wiring block (1) is inserted into an attachment hole formed through the substrate (3) and attached to the substrate (3), and the lead terminal (32 ) Is bent sideways so that the electronic component (A) lies down,
The sheet cover (21) is provided with a first protrusion (28) protruding toward the case cover (7) and a second protrusion (29) protruding toward the wiring block (1),
A plurality of first projections (28) of the seat lid (21) are provided in the longitudinal direction of the seat lid (21), and are spaced apart from the second projection (29) in the longitudinal direction of the seat lid (21). And the second projection (29) of the sheet lid (21) is a substrate to hold the electronic component (A) of the wiring block (1) sideways. (3) It is pressed to the side, and the portion corresponding to the second protrusion (29) of the seat cover (21) is spaced from the inner surface of the case cover (7) at an intermediate position between the plurality of first protrusions (28). A wiring block storage structure characterized by that. The case body (5) has a case bottom wall (8) and a pair of case side walls (9) standing up from both ends in the width direction of the case bottom wall (8). The sheet body (19) The sheet body (19) includes a wall (22) and a pair of sheet side walls (23) standing from both ends in the width direction of the sheet bottom wall (22). And a pair of sheet side walls (23) are arranged to follow the inner surface of the case side wall (9), and the wiring block (1) is accommodated in the sheet main body (19). ) Is disposed so as to face the case bottom wall (8), and the sheet bottom wall (22) is interposed between the substrate (3) and the case bottom wall (8). The housing structure for a wiring block according to claim 1 . Locking pieces (27) cut and raised are provided on both ends in the longitudinal direction of the case bottom wall (8). The pair of locking pieces (27) in the longitudinal direction allows the movement of the substrate (3) in the longitudinal direction. 3. The wiring block storage structure according to claim 2 , wherein the movement of the substrate (3) in the width direction is restricted by the pair of case side walls (9) of the case body (5). Support convex portions (30) are provided on both sides in the longitudinal direction of the sheet bottom wall (22), and the substrate (3) is supported by the convex convex portions (3) so that the wiring surface side of the substrate (3) floats from the sheet bottom wall (22). 30. The wiring block storage structure according to claim 2 , wherein the wiring block storage structure is supported by 30). An electronic component (B) that requires heat dissipation is attached to the wiring surface side of the substrate (3), and a heat dissipation rubber (31) is provided between the electronic component (B) and the seat bottom wall (22), 5. The wiring block storage structure according to claim 2 , wherein the heat dissipating rubber (31) is in contact with the case bottom wall (8) through the seat bottom wall (22).

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